Lasianthus bracteolatus Miq.

Zhu, H., Roos, M. C. & Ridsdale, C. E., 2012, A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae), Blumea 57 (1), pp. 1-102 : 21

publication ID	https://doi.org/10.3767/000651912X652012
DOI	https://doi.org/10.5281/zenodo.16854867
persistent identifier	https://treatment.plazi.org/id/1664BC60-3C59-0D13-FFEB-4910FF6E7E3E
treatment provided by	Felipe
scientific name	Lasianthus bracteolatus Miq.
status

Treatment

13. Lasianthus bracteolatus Miq. View in CoL

Lasianthus bracteolatus Miq. (1869) 246; Bakh.f. (1965) 337. — Type: Junghuhn s.n. (holo L, barcode L 0057503 ; iso L, barcode L0057504 ,L, barcode L0057505 ), Sumatra, Tapanuli .

Shrubs; branchlets terete, 2 –3 mm diam, densely appressed-pubescent to subglabrous, brown. Leaves: blades elliptic to obovate-elliptic, 9–13 by 4–6 cm, subcoriaceous, glabrous above, pubescent on midrib, nerves and nervules beneath, apex shortly caudate to cuspidate, base rounded to subrounded, slightly asymmetric, midrib and nerves flat above, prominent beneath, nerves 7–8 pairs, ascending at an angle of 60–70°, curved to the margin, nervules obscure above, prominent beneath, subparallel; petioles 4–5 mm long, densely pubescent. Stipules triangular-subulate, c. 4 mm long, densely pubescent. Cymes sessile; bracts linear, 5– 6 mm long, densely pubescent. Flowers sessile; calyx campanulate, densely pubescent, tube c. 2 mm long, lobes 5, subulate, c. 1 mm long; corolla not seen. Drupes globose, c. 3 mm diam, pubescent, crowned by subulate calyx lobes; pyrenes 4–5, smooth on the abaxial face.

Distribution — Indonesia (Java and Moluccas).

Note — This species has elliptic to obovate-elliptic leaves with 7–8 pairs of nerves, bracts linear, and drupes with 4–5 pyrenes. It differs from L. rigidus by having relatively small leaves with rounded base, longer petioles, bracts linear and shorter, calyx lobes subulate, small and smaller pubescent drupes.